The rf.exs script allows finding Unicode characters by name:
$ ./rf.exs face cat
U+1F431 🐱 CAT FACE
U+1F638 😸 GRINNING CAT FACE WITH SMILING EYES
U+1F639 😹 CAT FACE WITH TEARS OF JOY
U+1F63A 😺 SMILING CAT FACE WITH OPEN MOUTH
U+1F63B 😻 SMILING CAT FACE WITH HEART-SHAPED EYES
U+1F63C 😼 CAT FACE WITH WRY SMILE
U+1F63D 😽 KISSING CAT FACE WITH CLOSED EYES
U+1F63E 😾 POUTING CAT FACE
U+1F63F 😿 CRYING CAT FACE
U+1F640 🙀 WEARY CAT FACE
To operate, rf.exs reads the UnicodeData.txt file in this directory.
To get the most up-to-date version of UnicodeData.txt,
download it from the official source:
$ curl -O ftp:https://ftp.unicode.org/Public/UNIDATA/UnicodeData.txt